v4.1.1

fix(audit-closures-v4-1-1): v4.1.1 hotfix #3 — CHANGELOG heading format

The publish workflow's "Verify README + CHANGELOG" gate enforces:

^## ${TAG_VERSION}[[:space:]]

Phase 8 wrote ## [4.1.1] - 2026-05-08 (Keep-a-Changelog with brackets).
The workflow regex doesn't accept the brackets — needs ## 4.1.1 — DATE
matching the v4.1.0 entry style established earlier.

Replaced ## [4.1.1] - 2026-05-08 with ## 4.1.1 — 2026-05-08 (em-dash
matching v4.1.0 entry) across all 3 CHANGELOG files.

Re-tagging v4.1.1 at this commit (publish workflow run failed at the
verify step; no npm artifacts published; safe to retag).

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com